leica dm750 p manual

Leica DM750 PManual

Leica DM750 P Manual 2

Chapter overview

Safety regulations 4

The Leica DM750 P 15

Get Ready! 18

Get Set! 24

Go! 36

Care of the Microscope 38

Dimensions 42


Contents

Safety regulations 4Safety concept 5Symbols used in this operating manual 6Important Notes 7Instructions on use 8Health risks and dangers of use 10Information for the person responsible for the instrument 11Care instructions 12Accessories, maintenance and repair 13Electrical data and ambient conditions 14

The Leica DM750 P 15Introduction 16Unpacking 17

Get Ready! 18Attaching Analyzer Module or Analyzer/Bertrand Lens Module 19Viewing Tube 20Installing Objectives 21Substage Condenser 22

Get Set! 24Basic setup 25Using the Aperture Condenser 26Setting up Polarized Light 27Focusing 29Viewing Tube Adjustment 30Koehler Set up 31Objective Centration 32Bertrand Lens Operation 34Time Delay Shutoff 35

Go! 36Ready! Set! Go! 37

Care of the Microscope 38General maintenance 39Mechanical Maintenance 41

Dimensions 42


Safety regulations


Safety concept

The individual modules of the Leica DM micros-copy series include an interactive CD-ROM with all relevant user manuals in several languages. Keep it in a safe place, and readily accessible to the user. User manuals and updates are also available for you to download and print from our web site atwww.leica-microsystems.com.

This operating manual describes the special functions of the individual modules of the Leica DM microscopy series and contains important instructions for their operational safety, main-tenance, and accessories.

The "Safety concept" booklet contains addi-tional safety information regarding the service work, requirements and the handling of micro-scope, accessories and electrical accessories as well as general safety instructions.

You can combine individual system articles with articles from external suppliers. Please read the user manual and the safety requirements of the supplier.

Before installing, operating or using the instru-ments, read the user manuals listed above. In particular, please observe all safety instruc-tions.

To maintain the unit in its original condition and to ensure safe operation, the user must follow the instructions and warnings contained in these user manuals.

http://www.leica-microsystems.com


Symbols used in this operating manual

Warning of a danger

• This symbol indicates especially impor-tant information that must be read and

complied with.

Failure to comply can cause the following: Ϙ Hazards to personnel

Ϙ Functional disturbances or damaged instru-ments

Warning of hazardous electrical voltage

This symbol indicates especially impor-tant information that is mandatory to

read and observe.

Failure to comply can cause the following: Ϙ Hazards to personnel

Ϙ Functional disturbances or damaged instruments

Danger due to hot surface.

This symbol warns against touching accessible hot surfaces, e.g. those of

light bulbs.

Important information

This symbol indicates additional infor-mation or explanations that intend to

provide clarity.

Explanatory notes ▶ This symbol within the text points to addi-

tional information and explanations.


Important Notes

DescriptionThe Leica DM750 P microscope meets today's state of the art of technology. Nevertheless, hazards may still arise during operation. The potential risks are described below.

• Before installing, operating or using the instruments, it is required to read this

user manual. In particular, please observe all safety instructions.

Contact addressLeica Microsystems (Switzerland) Ltd.Industry DivisionMax Schmidheiny Strasse 201CH-9435 Heerbrugg (Switzerland)

User ManualThis user manual includes important instruc-tions related to operating safety, maintenance and accessories,

Your Leica DM750 P microscope comes with an interactive CD-ROM with all

relevant user manuals. Keep it in a safe place, and readily accessible to the user. User manu-als and updates are also available for you to download and print from our web site at www.leica-microsystems.com

Accessories from third-party suppliersYou can combine individual system articles with articles from external suppliers. Please read the user manual and the safety requirements of the supplier.

Original conditionTo maintain the unit in its original condition and to ensure safe operation, the user must follow the instructions and warnings contained in these user manuals.

Legal requirementsAdhere to general and local regulations relat-ing to accident prevention and environmental protection.

EC Declaration of ConformityElectrically operated accessories are constructed based on the state of the art of technology and are provided with an EC Declaration of Conformity.

http://www.leica-microsystems.com


Instructions on use

Intended useThe Leica DM750 P microscope is an optical instrument which uses magnification and illu-mination to improve the visibility of objects. It is used for observing and documenting.

The Leica DM750 P microscope may be used only in closed rooms and must be placed on a solid floor.

The Leica DM750 P microscope can be used in clean rooms without any problems.

• Position the Leica DM750 P microscope so that it can be disconnected from the

power supply at any time. The power cord must remain accessible at all times.

Place of useOnly use the instruments in closed, dust free rooms and between +10 °C and +40 °C. Protect the devices from oil, chemicals and extreme humidity. If using the devices outdoors, protect them from dust and moisture. Never use electri-cal devices outdoors. Install electrical devices at least 10 cm from the wall and away from flam-mable substances.

Avoid large temperature fluctuations, direct sunlight and vibrations. These conditions can distort measurements and micrographic images.

In warm and warm-damp climatic zones, the individual components require

special care in order to prevent the build-up of fungus.

Non-intended use

• Using the instrument in any way contrary to the specifications in the user

manual can lead to bodily harm and damage to objects. Doing so can impair the functions of the protective measures provided.

Never install any other plug (NEMA 5-15P) or unscrew any mechanical

components unless expressly instructed to do so in the instructions.

The devices and accessories described in this operating manual have been tested

for safety and potential hazards.


Instructions on use (continued)

• The responsible Leica affiliate must be consulted whenever the instrument is

altered, modified or used in conjunction with non-Leica components that are outside of the scope of this manual.

• Unauthorized alterations to the device or noncompliant use shall void all rights

to any warranty claims.

TransportIf at all possible, use the original packaging for shipping or transporting individual modules.

In order to prevent damage from vibrations, disassemble all moving parts that (according to the user manual) can be assembled and disas-sembled by the customer and pack them sepa-rately.

DisposalDisposal must comply with locally applicable laws and regulations.

Integration in third-party productsWhen installing Leica products into third-party products, the manufacturer of the complete system or its dealer is responsible for follow-ing all applicable safety instructions, laws and guidelines.


Health risks and dangers of use

Health risks

Workplaces with microscopes facilitate and improve the viewing task, but they

also impose high demands on the eyes and holding muscles of the user. Depending on the duration of uninterrupted work, asthenopia and musculoskeletal problems may occur. For this reason, appropriate measures for reduction of the workload must be taken:

Ϙ Optimum workplace layout

Ϙ Frequent changes of activity

Ϙ Thorough training of the personnel, giving consideration to ergonomic and organiza-tional aspects.

The ergonomic design and construction of the Leica microscopy series are intended to reduce the exertion of the user to a minimum.

Danger of infection

• Direct contact with eyepieces is a poten-tial transmission method for bacterial

and viral infections of the eye.

The risk can be kept to a minimum by using personal eyepieces for each indi-

vidual or detachable eyecups.

Dangers during use Ϙ The Leica DM750 P microscope may only be

connected to a grounded socket.

Ϙ The Leica DM750 P microscope may not be operated unless it is in proper functioning condition.


Information for the person responsible for the instrument

Information for the person responsible for the instrument

Ϙ Ensure that the Leica DM750 P microscope is used only by qualified personnel.

Ϙ Ensure that this user manual is always avail-able at the Leica DM750 P microscope.

Ϙ Carry out regular inspections to make certain that the authorized users are adher-ing to safety requirements.

Ϙ When instructing new users, do so thor-oughly and explain the meanings of the warning signs and messages.

Ϙ Assign individual responsibilities for start-ing, operating and servicing the instru-ment and monitor the observance of these responsibilities.

Ϙ Do not use the Leica DM750 P microscope unless it is in perfect condition.

Ϙ Inform your Leica representative or Leica Microsystems (Schweiz) AG, Industry Division, 9435 Heerbrugg, Switzerland, immediately of any product defect that could potentially cause injury or harm.

Ϙ If you use accessories made by third-party manufacturers with the Leica DM750 P microscope, be sure that each such manu-facturer confirms the safety-engineering, harmless usability of the product and observe the product's user manual.

Ϙ Modifications and maintenance of the Leica DM750 P microscope may only be performed by professionals expressly authorized by Leica.

Ϙ Only original Leica replacement parts may be used in servicing the product.

Ϙ After service work or technical modifica-tions, the unit must be reconfigured with observance to our technical requirements.

Ϙ If the unit is modified or serviced by unau-thorized persons, is improperly maintained (as long as maintenance was not carried out by us), or is handled improperly, Leica will not accept any liability.

Ϙ The electric installation in the building must conform to the national standard, e.g. current-operated ground leakage protec-tion (fault-current protection) is suggested.


Care instructions

General instructions Ϙ Protect the Leica DM750 P microscope

against damp, vapors, acids, alkalis, and corrosive substances. Do not store chemi-cals in the vicinity.

Ϙ Protect the Leica DM750 P microscope from oil and grease. Never grease or oil mechani-cal parts or sliding surfaces.

Ϙ Follow the instructions of the disinfectant manufacturer.

Ϙ It is advisable to enter a service agreement with Leica Service.

Cleaning coated parts and plastic parts Ϙ Dust and dirt particles should be removed

with a soft brush or lint-free cotton cloth.

Ϙ Remove coarse debris with a moistened disposable cloth.

Ϙ Clinging dirt can be removed using petro-leum ether or alcohol

Ϙ Acetone, xylene or nitro-containing thin-ners must NOT be used.

Ϙ Never use chemicals to clean colored surfaces or accessories with rubberized parts. This could damage the surfaces, and specimens could be contaminated by abraded particles.

Cleaning glass surfaces Ϙ Remove dust using a fine, dry and grease-

free brush made from hair, by blowing with a squeeze blower, or by using a vacuum.

Ϙ Remove dirt using a clean cloth that has been moistened with distilled water.

Ϙ Remove tough dirt using alcohol, chloro-form or petroleum ether.


Accessories, maintenance and repair

AccessoriesOnly the following accessories may be used with the Leica DM750 P microscope:

Ϙ The Leica accessories described in this user manual.

Ϙ Other accessories, provided that these have been expressly approved by Leica as being technically safe in this context.

Maintenance Ϙ The Leica DM750 P microscope is basically

maintenance-free. To ensure that it always operates safely and reliably, we recommend that you take the precaution of contacting the responsible service organization.

You can arrange for periodic inspections or, if appropriate, conclude a mainte-

nance contract with them.

Ϙ It is advisable to enter a service agreement with Leica Service.

Ϙ For maintenance and repair, only OEM spare parts may be used.

Repairs and service work Ϙ Only original Leica Microsystems spare

parts may be used.

Ϙ Before opening the instruments, switch off the power and unplug the power cable.

Ϙ Avoid contact with powered electrical circuits, which can lead to injury.

Service addressIn case of problems, please contact us as follows:

Leica Microsystems (Switzerland) Ltd.Industry DivisionMax Schmidheiny Strasse 201CH-9435 Heerbrugg (Switzerland)Phone +41 71 726 33 28


Electrical data and ambient conditions

EnvironmentTemperature for use +10 °C … +40 °C

Storage temperature -20 °C … +52 °C

+50 °F … +104 °F

Manipulation shock 25 mm on 50 mm hard wood

Transport shock (unpacked) 100 g / 6 ms

Transport shock (packed) 800 mm free fall

Transport vibrations (unpacked) 5–200 Hz / 1.5 g

Atmospheric pressure "in use" and for storage: 500–1060 mBar

Humidity "in use" and for storage: 20–90%

Installation Category II (Overvoltage Category)

Pollution degree 2

Fuse Replacement

Unplug the instrument before changing any fuses. The Leica DM750 P has two fuses, which are located behind the

power cord receptacle.

• Use only fuse type: 5×20 mm, 1 Amp/250V, Quick acting (# 13RFAG30003)

Electrical dataInput: 100-240 V, 50/60 Hz, 5 W (3 W LED)


The Leica DM750 P


Thank you for purchasing the Leica DM750 P Polarizing Microscope System from Leica Microsystems. The Leica DM750 P is a highly adaptable instrument with superior optics and precision engineering for educational and basic industrial polarized light microscopy applica-tions.

Introduction


Ϙ Carefully remove the microscope and any components from the packing carton.

Ϙ Check the components against the planned configuration.

Ϙ Optional items such as contrast accessories, camera adapters, cameras, and carrying cases are not shipped as part of the stan-dard equipment. These items are delivered in separate packages.

Ϙ Please do not discard any of the packing materials. They should be used for safely storing and transporting the instrument should the need arise.

Unpacking


Get Ready!


2. Align the shape of the module with the shape of the microscope stand.

3. Insert the dovetail of the module into the stand. (Analyzer/Bertrand Lens Module shown).

Attaching Analyzer Module or Analyzer/Bertrand Lens Module

Tools used

Ϙ Allen key

1. Slightly unscrew the set screw located on top of the stand with the Allen key tool provided.

4. Tighten the set screw to lock the module into place.


Viewing Tube

1. Slightly unscrew the set screw located on the top of the Analyzer module.

2. Align the shape of the polarizing viewing tube with the shape of the module.

3. Insert the dovetail of the polarizing view-ing tube into the module and tighten the set screw firmly without forcing it. This precisely positions the body onto the opti-cal axis of the microscope.

Install the eyepiece with the crossline reticle into the right eyetube so that

the raised feature on the eyepiece aligns and is seated with the orientation slot in the right eyetube.

4. Insert the eyepieces into the eyetubes.

5. If you wear eyeglasses for microscope view-ing, keep the rubber eyeguards folded down. If you do not wear eyeglasses, you may find it useful to unfold the rubber eyeguards in order to block out ambient room light.


1. As you rotate the nosepiece clockwise, attach the objectives by screwing them into the nosepiece holes starting with the lowest magnification and advancing to the highest magnification.

Installing Objectives

If you have purchased a standard micro-scope configuration, you will notice the

objectives are already installed on the nose-piece and the substage condenser is already installed on the stand. In this case, go to section "Operation". If you purchased your Leica DM750 P by components and not by standard configu-ration, please continue in this section.

• Always rotate the nosepiece by using the knurled nosepiece ring.


Substage Condenser

Substage Condenser

The Leica DM750 P has an open substage condenser mount. Therefore, the

condenser needs to be installed.

1. Raise the stage to its highest position using the coarse focus knob on the right side of the microscope.

2. Adjust the condenser mount to its lowest position using the condenser focus knob on the left-hand side of the substage.

3. Swing the polarizer, which is connected to the bottom of the condenser mount, to the left.


Substage Condenser (cont.)

4. Completely loosen the two thumbscrews on the condenser mount.

5. Slide the substage condenser into the fork mount located underneath the stage by aligning the positioning pin on the condenser into the slot on the back of the fork.

6. Raise the condenser to its highest position using the condenser focus on the left-hand side of the substage

7. Tighten the thumbscrews to roughly center the substage condenser so that the top lens of the condenser is centered beneath the objective in use. You will more accurately center and focus the condenser when you reach section Koehler Setup.


Get Set!


Basic setup

As a safety precaution, the power cord has been grounded to the microscope

base. Never use an adapter between the power cord and the power source; it will render the grounding feature ineffective.

Work Surface

• Always use your microscope on a hard, stable surface.

Power1. If the power cord is not already attached,

attach it securely to the back of the micro-scope.

2. Plug the microscope power cord into a suitable grounded electrical outlet. A grounded 3-wire cord is provided.

3. Set the illumination control (knob is located on the bottom left-hand side of the micro-scope stand) to the lowest setting to start. The illumination control knob allows you to adjust the intensity of light produced by the illumination system.

4. Turn on the microscope using the switch on the bottom right-hand side of the micro-scope stand.


The condenser is furnished with an iris diaphragm, which can be adjusted to

match the effective numerical aperture of the objective.

1. To open and close this diaphragm, simply rotate the knurled condenser ring to the right or to the left so that the line on the rotating ring aligns with the objective magnification in use.

2. To start, fully open the iris diaphragm of the aperture condenser by rotating the ring to the extreme right.

Using the Aperture Condenser


The polarizer is located under the substage condenser in a swing in/out

mount. Swing it into place and be sure it "clicks" into place.

1. Loosen the polarizer locking thumbscrew, which is located on the right-hand side of the polarizer.

2. Rotate the polarizer to the zero position.

Setting up Polarized Light


Setting up Polarized Light (cont.)

The Analyzer is located in the module between the viewing tube and the stand

either in a slider module or in an Analyzer Bertrand Lens module. If you have a slider, slide the Analyzer into position.

3. If you have an Analyzer/Bertrand Lens module, swing in the Analyzer by flipping the lower rocker of the module to the right (the "A" position/Analyzer in), while ensuring the upper rocker of the Analyzer/Bertrand Lens Module is flipped to the left (the "O" position/Bertrand Lens out).

4. Increase the illumination intensity slightly. You will notice while looking into the microscope with the Polarizer and Analyzer in place and no specimen, that the field will look dark. If not, rotate the polarizer slightly until you have the darkest field of view.


Focusing1. Place a polarized light specimen on the

stage.

2. Rotate the 10× objective into working posi-tion.

3. Raise the microscope stage using the coarse adjustment knob until you reach its positive stop or the specimen touches the objective.

4. Look into the eyepieces and adjust the illu-mination intensity so that it is comfortable for viewing.

5. Using the fine focus adjustment knob, bring the specimen into sharp focus.

Focusing


Adjust the eyetubes for your interpupillary distance.

1. Fold or unfold the eyetubes until you see one illuminated circle.

The viewing tubes maintain a constant tube length for all interpupillary settings.

This means that a change of interpupillary distance does not affect parfocality, magnifica-tion, or calibrations that depend on magnifica-tion.

• To correctly set the eyepieces, be sure the crosshair eyepiece is seated securely

in the slot of the right eyetube.

2. Focus the crosshair reticle by gripping the knurl and rotating the top of the eyepiece until the reticle is in clear focus.

3. While looking through only the crosshair eyepiece, bring the specimen into focus with the fine focus of the microscope.

It may help to cover your left eye.

4. Now switch to look only through the other eyepiece (focusing eyepiece without crosshair) with the other eye.

• This time, focus the specimen by using the focusing capability in the focusing

eyepiece. Do not raise or lower the stage to focus!

5. Grip the knurl on the focusing eyepiece with one hand and rotate the top of the eyepiece with the other hand until the specimen is in focus with this eye and this focusing eyepiece. This corrects for any vision differences between your right eye and left eye.

6. Now switch to a high magnification objec-tive (not an oil objective) and focus the microscope while viewing with both eyes.

The higher magnifications have a shal-lower depth of field. Therefore, after

focusing with a high magnification, you will find that when you change to a lower magni-fication, you only have to adjust the fine focus slightly, if at all.

Viewing Tube Adjustment


Koehler Set up1. Close the Koehler field diaphragm on the base of the microscope so

that its iris leaves are present within the field of view when looking into the eyepieces.

2. Use the condenser focus knob on the left-hand side of the substage to bring the leaves of the field diaphragm into sharp focus.

3. Turn the condenser centering thumbscrews simultaneously to center the image of the field diaphragm in the field of view.

4. Open the field diaphragm until the iris leaves disappear just beyond the field of view.

Koehler Set up


Tools used Ϙ Centering keys

1. Retrieve the two centering keys from the packaging and insert the centering tools into the centering holes located above the objective in use. Engage the ball end of the centering tools into the set screws, which are hidden in the centering holes.

2. Focus the polarizing sample.

3. Move a noticeable point of the sample to the center of the crosslines.

4. Loosen the stage brake and rotate the stage until the noticeable point of the sample is furthest away from the center of the cross-lines. This may even be outside of the field of view. This indicates the objective is not centered to the stage.

Objective Centration


5. Adjust the objective centering screws until the noticeable point of the sample is midway between the furthest position and the center of the crosslines. This moves the objective center closer to the stage center.

6. Move the specimen (not the objective centering screws!) so that the noticeable point is at the center of the crosslines once again.

7. Check to make sure that the noticeable point stays at the center of the crosslines when the stage is rotated. If not, repeat the centering process.

Each objective must be centered sepa-rately. Also, there is a magnetic storage

location for the objective centering tools in the back of the Analyzer or Analyzer/Bertrand Lens modules.

Objective Centration (cont.)


If you have an Analyzer/Bertrand Lens module, you can view a conoscopic

image through the eyepieces.

1. Bring the portion of the specimen you would like to view in conoscopy (with the Bertrand Lens) to the center of the field

2. Swing in the Bertrand Lens by flipping the upper rocker of the Analyzer/Bertrand Lens module to the "B" position. Be sure the Polarizer and Analyzer are also in position.

You can now view the conoscopic image through the eyepieces.

3. If necessary, you can fine tune the Bertrand Lens centration with the tools provided.

4. If you have an Analyzer/Bertrand Lens with a focusable Bertrand Lens, you can now turn the knob on the upper rocker to focus the Bertrand Lens image.

Bertrand Lens Operation


The Leica DM 750 P is equipped with a time delay shutoff capability, which

automatically turns the illumination off after 2 hours of no changes in the intensity control.

Ϙ The time delay shutoff IS enabled as a default.

Changing the status of the time delay shutoff

1. Rotate the intensity control to the lowest setting.

2. Turn the power on.

3. Rotate the intensity control to full high intensity, then back to full low intensity all within 5 seconds.

Ϙ The LED Illumination will flash to indicate the time delay shutoff status was changed.

Ϙ The LED Illumination will flash two times slowly then stay on when you disable the Time Delay Shutoff.

Ϙ The LED Illumination will flash three times quickly then stay on when you enable the Time Delay Shutoff.

When you turn the power off and then turn the power on again, the system will

be in the last Time Delay Shutoff status (Enabled or Disabled) and you will not see any blinking.

Time Delay Shutoff


Go!


Now all you need to do is change objectives, set the aperture condenser and field diaphragm appropriately for the objective magnification in use, and enjoy the view!

Ready! Set! Go!


Care of the Microscope


General maintenance

General

• Always carry the microscope using two hands. There is a handle on the back of

the microscope and an undercut in the front for this purpose.

Ϙ The cord wrap allows you to wrap the cord in such a way that only the length you need is extended.

Ϙ Proper storage of accessories in the appro-priate positions is important to keep them safe from loss or damage. There are storage places for the objective centering tools and for two compensators in the rear of the Analyzer/Bertrand Lens module.


Ϙ Keeping all optical components clean is important for maintaining good optical performance.

Ϙ The microscope should always be covered with the plastic dust cover (provided with the instrument) when it is not in use.

Ϙ If any optical surface becomes coated with dust or dirt, clean the surface by blowing it off with a syringe or brushing it off with a camel hair brush before attempting to wipe the surface clean.

Ϙ Optical surfaces should be cleaned with a lint-free cloth, lens tissue or a cotton swab moistened with methanol or commercially available glass cleaner. Do not use alcohol.

Ϙ It is very important to avoid the excessive use of solvent, so use them sparingly. The lint-free cloth, lens tissue or cotton swab should be moistened with solvent, but not be wet enough for the solvent to seep around the lens.

Ϙ No part of the microscope is quite so vulner-able to collecting dirt, dust, and oil as the front lens of the objective. Whenever you encounter lack of contrast, cloudiness or poor definition, carefully check the condi-tion of the front lens with a magnifier.

Ϙ The lower magnification objectives have fairly large front lenses and can be cleaned with a cloth or lens tissue wrapped around a finger and moistened with methanol. Do not use alcohol.

Ϙ Cleaning 40× and 100× objectives requires more care. Note: To achieve the high degree of flatness obtained with the higher magni-fication objectives, the objective has a small

concave front lens of fairly short radius or curvature. The surface of this front lens can be readily cleaned with a toothpick covered with a cotton tip, or with a small cotton swab. Moisten the cotton with metha-nol and squeeze it almost dry. Wipe the front lens lightly without applying undue force or scrubbing action. Make sure that the cotton tip contacts the concave lens surface. Check the objective with a magni-fier after cleaning.

Ϙ If you need to remove the microscope’s viewing body, be careful not to accidentally touch the outer lens surface (located on the underside of the body). Fingerprints on this surface will reduce image clarity. This lens can be cleaned in the same manner as objectives and eyepieces.

General maintenance (cont.)


Mechanical Maintenance

Mechanical Maintenance Ϙ Use the dust cover. It is the most impor-

tant way to keep the microscope in good mechanical and physical condition.

Ϙ The Leica DM750 P has a durable finish. All non-optical parts of the instrument can be cleaned with methanol, naptha, or soap and water. Avoid the use of all other organic solvents when cleaning the instrument.


Dimensions

leica dm750 p manual

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